def __init__(self, user, password, host = "127.0.0.1", port = 3306, database = None):
     BaseConnection.__init__(self,user, password, host, port, database, "MySQL")
 def __init__(self, user, password, database = None, host = "127.0.0.1", port = 5432):
     BaseConnection.__init__(self,user, password, host, port, database, "PostgreSQL")